Installation package for prefabricated door



Dec. 8, 1970 F. ODENDHAL ETAL 3,545,133

I I INSTALLATION FOR PREFABRICATED DOOR Filed Nov. 15, 1968 4sheets-sheet 1 il w INVENTORS ATTORNEYS Dec. 8, 1970 F. ODENDHAL ErAL3,545,133

INSTALLATION FOR PREFABRIOATED DOOR Filed Nov. 15, 1968 4 sheeis-sheet 2INVENT ORS /z-? n//vf @pava/ML 9( PA rH/c/f dfz/Ff y ATroRNEYINSTALLATIONI'OR PREFABRICATED DOOR Filed Nov. l5, 1968 4 Sheets-Sheet 5ATTORNEYS Dec. 8, 1970 F. oDENDHAL ETAL 3,545,133

INSTALLATION FOR PREFABRICATED DOOR Filed Nov. 15, 196e 4 sheets-sheep4.

zNvEm'oRS ATronNEYg United States Patent O 3,545,133 INSTALLATIONPACKAGE FOR PREFABRICATED DOOR Fortune Odendhal and Patrick J. Duffy,Hagerstown,

Md., assignors to Jamison Door Company, Hagerstown, Md., a corporationof Maryland Filed Nov. 15, 1968, Ser. No. 776,099 Int. Cl. E06b 1/52,3/42 U.S. Cl. 49--380 13 Claims ABSTRACT OF THE DISCLOSURE BACKGROUNDAND BRIEF DESCRIPTION OF INVENTION This invention relates to theinstallation of doors over openings which are formed through walls, andin particular, the invention is concerned with providing a novel"Hinstallation package which permits a precise and rapid erection andsuspension of relatively heavy doors externally of existing wallstructures or of wall structures which cannot be easily modified tocarry heavy loads. The invention has particular utility in providing ameans for installing relatively heavy insulated doors of the type whichare used to seal openings entering into cold storage rooms or buildings.However, the invention is equally useful for the installation of othertypes of doors.

It is known in this industry to provide insulated door structures whichare useful for insulating a room or area from temperature changes orfrom noises, and such doors are relatively heavy because of theirinsulating characteristics and because they are typically installed tocover relatively large openings of the type which might be found inwarehouses or other large storage areas. Further, it is known to providepower actuating means in combination with such doors to effect anopening and closing of the doors relative to a door opening. Such doorsmay be mounted as overhung doors which are carried on an externalsurface of a wall so that one or more door panels or segments can slidealong an overhead rail relative to the wall. Because of the size andweight of the door panels, and of power equipment which may beassociated with them, it has been the practice of this industry tosubstantially modify existing or new wall structures to accept theweight loads of such doors. In the case of existing walls, it has beennecessary to carry out considerable reconstruction and reinforcement ofa wall to support the heavy load of the doors and their associatedcontrol equipment. As for new buildings, it has been necessary toconsider special designs and reinforcements for walls where such doorsare to be installed because modern panel wall constructions do notprovide suiiicient strength to carry such loads.

In contrast to the prior practices of this industry, the presentinvention provides for an installation package which can be positionedand installed against any existing or new wall construction without arequirement for providing load bearing structures Within the wallitself. In accordance with this invention, a support frame means ispositioned on one side of a wall through which a door opening is formed,and the support frame means func- 3,545,133 Patented Dec. 8, 1970 tionsto carry all loads of the door, and its associated control equipment,without transmitting any heavy loads to the wall. The support framemeans may be in the form of a pair of support frame units positioned ateach upright edge of a doorway, and each support frame unit includesframing members which extend outwardly from the wall and downwardly to afloor area which is adjacent the wall. IIn addition, the support frameunits include means for suspending a door means over the door opening,and thus, the Weight of the door means is carried by the support frameunits.

In a preferred embodiment of the invention, separate support frame unitsare positioned at each side of a doorway, on one side of a wall, so asto carry an overhead track between the pair of units and over the dooropening which is formed through the wall. One or more door panels orsegments are hung from the overhead track so that bearing elementscarried by the door segments -can slide or roll along the track.Preferably, a power unit is also carried by the support frame means sothat the power unit is protected within the frame means itself and sothat the door means can be opened and closed automatically. The supportframe units include individual framing elements which also function asguard rails at each side of a doorway, and similar guard rails can beinstalled on an opposite side of the wall from the side which carriesthe door.

With this invention, it is possible to assemble, test, and adjust acomplete installation unit at a point of manufacture so that doors, andtheir associated support frame units are completely tted to each otherand ready for installation at a job location. The support frame unitsand doors, in their tested and adjusted condition, can be shipped to thepoint of installation, and then, installation can be carried out veryrapidly and with very little treatment of the wall structure throughwhich the doorway is to be formed. The support frame units of theinstallation package can be erected quickly at the job site, and a doorcan be installed in a condition which requires very little furtheradjustment to provide a tight seal of the door relative to wall areasaround a door opening. Power units can be used with the door to providean actuating mechanism for opening and closing the door, and all unitsof the installation package can be preassembled, tested and adjusted atthe point of manufacture prior to shipment to a customer. Components ofthe shipped package can then be put in place against any existing or newwall construction without a requirement for providing load bearingmembers within the wall.

These and other advantages of the present invention will become apparentin the more detailed discussion which follows, and in that discussionreference will be made to the accompanying drawings as briefly discussedbelow.

BRIEF DESCRIPTION OF DRAWINGS FIG. l is a perspective view of theinstallation package of this invention, as installed relative to atypical door opening;

FIG. 2 illustrates a partial assembly of the installation package ofthis invention to show the method of assembly;

FIG. 3 is a side elevational view showing the relationships of aninstalled support frame unit relative to a wall;

FIG. 4 is an elevational view similar to FIG. 3, but showing details forconnecting upper portions of the support frame unit to a wall;

FIG. 5 is a view similar to FIG. 4, showing an alternative means forconnecting an upper portion of a support frame unit to a wall;

FIG. `6 is similar to the views of FIGS. 4 and 5, showing a third meansfor installing an upper portion of a support frame unit relative to awall;

FIG. 7 is an elevational view of a lower end of a support frame unit,illustrating details for anchoring the unit in a oor area adjacent to awall;

FIG. 8 is a similar view to FIG. 7, showing an alternative way ofanchoring a support frame unit into a floor; and

FIG. 9 is a further view similar to FIGS. 7 and 8, showing a third wayof anchoring a support frame unit relative to a tloor.

DETAILED DESCRIPTION OF INVENTION Referring to FIG. 1, the installationpackage of this in- -vention is illustrated in an assembled conditionrelative to a door opening formed through a wall. The installationpackage includes a support frame means which is shown as including twoseparate support frame units 10` and 12. Each support frame unitincludes framing members of the type shown at 14, and each such framingmember is shaped to include a generally horizontally disposed portion 16and a generally vertically disposed portion 18, when it is installed. Itcan be seen that the horizontally disposed portions 16 constitute upperportions of the support frame means which can be connected to a wall,and the lvertically disposed portions 18 include base portions which canbe anchored at 62 into a -oor area immediately adjacent to the wallthrough `which the door opening is formed. Each support frame unit 10and 12 may include a pair of framing members 14 which are spaced fromone another by rigid connecting members 20 and 22 so as to form a rigid,unitary structure which can be easily handled and fixed in placerelative to a wall. The support frame units 10 and 12 are positioned oneach side of the wall so as to suspend and carry the load of a doorwhich is mounted externally of the wall. In the illustrated embodiment,an overhead supporting means in the form of an overhead track 24 issuspended from the support frame units 10 and 12, and the overhead track24 functions to carry the load of a door means while it is being movedrelative to a door opening formed through the wall. Thus, the supportframe means, made up of two separate support frame units, is positionedand installed on the side of a wall at which a door is to be carried,and the two support frame units are positioned at each side of thedoorway so as to not obstruct a clear passage through the doorway whenthe door is in an open position.

The support frame units 10 and 12 may be made up of any desired numberof framing members 14 and 20 which are interconnected together to formunitary structures that can be positioned against a vertical surface ofan existing wall. The support frame means functions to carry all loadsof a door and of any associated power equipment that may be used toactuate the door to and from opened and closed positions, and thus,relatively heavy, insulated doors can be installed without modifying orreinforcing wall structures which are otherwise inadequate for carryingsuch loads. It can be seen that the individual framing members 14 of theillustrated support frame units receive essentially all downward andoutward loads which normally result from an overhung door assembly. Withthe illustrated arrangement, it is possible to provide a yvery tightthermal seal for a doorway in a refrigerator room or building, and theres no requirement for substantially modifying, rebuilding, or reinforcingexisting structures to accommodate such a door. Further, theinstallation package of the present invention avoids the usualstructural modifications that are required to install doors withinpockets formed in wall structures. FIG. 1 also illustrates an overheadprotective member 25 |which may be connected (as by a use of bolts andnuts, or other fasteners) between a pair of support frame units 10 and12 to protect the upper part of a doorway. The member 25 gives an earlywarning as to whether a lift truck or other device will CFI clear thedoorway. In a typical installation, guard rails and protective members25 are positioned on both sides of a wall (as shown in FIG. 4) toprotect a doorway.

FIG. 2 illustrates the installation package of FIG. 1 in a partiallyassembled and installed condition. A support frame unit 12 isillustrated in the assembled form in which it is shipped from the pointof manufacture, and such a unit includes (a) the unitary structure madeup of framing members 14 and 20, (b) a single panel or segment '26 of atwo-panel door which is to be installed, and (c) a portion (one-half inthe illustration) of an overhead track 24. One of the features of thepresent invention is that all necessary components for an assembled doorcan be pre-assembled, tested, and adjusted at the point of manufactureso that the installation package can be shipped in a condition forrelatively rapid and efficient erection at a building site. For example,the support frame units 10 and 12 can be erected in a testing station atthe point of manufacture, and the overhead tracks 24 can be attached tothe erected support frame units so that adjustments can be made in thetrack to provide a level and properly positioned suspension means for adoor. In addition, the door itself, which may be made up of one or morepanels 26, can be hung in the erected unit at the test center, andfurther adjustments can be made to align the door with the track andwith a reference wall structure so that a precise, and tight, closing ofthe door can be effected. The door panels 26 may be of any knownconstruction and are mounted to roll or slide along the track 24 in anywell known manner. Bearing elements are carried by brackets 27 to engagethe track 24. If the door is of the type which is to be actuated by apower unit, a power unit 28 (including an electric motor and a controlpanel) can also be installed at the factory test station and adjusted toa condition for actuating the door. Then, the installation package,including the two support frame units 10 and 12, can be removed from thetest center and packed for shipment. The illustrated support frame units10 and 12 provide convenient shipping packages which carry all of thebasic components of a door assembly in an assembled, adjusted, andtested condition. The framing members 14 provide protection duringshipment for the power unit 28 and its associated mechanisms andcontrols, and very little assembly or adjustment is required at the jobsite.

FIG. 2 also illustrates a method of assembly wherein a support frameunit 10 is shown as being raised (from the position shown for the unit12) and positioned against a previously prepared wall surface laround adoor opening. The wall surface should be plumb, true, and square for theareas around the doorway which receive the nstallation package, and thefloor area adjacent to the wall surface should be relatively level.Then, the individual support frame units 10 and 12 can be lifted andpositioned into place, as shown in FIG. 2, and the attached overheadtrack portion 24 can be used as a template to mark bolt positions on thewall surface to which the support frame units are to be connected.Several types of connections to wall surfaces are shown in FIGS. `4through 6. Then, the individual support frame units can be temporarilymoved away from the wall so that borings can be made through the wall toreceive bolts which fasten the overhead track to the wall surface. Ofcourse, it can be appreciated that the connection of the track to thewall surface does not place the load of the door on the wall since thetrack is secured and suspended from the support frame units themselves(as shown in FIGS. 4 through 6). Finally, the support frame units can beput back into their intended positions against the wall surface, andbolts can be inserted through the wall to connect the overhead trackportions and the support frame units to the wall. The overhead track 24includes a number of openings through it for positioning fastening boltsin desired locations relative to the wall. In a similar manner, thelower ends of the support frame units can be anchored to the iloor areawhich is adjacent to the doorway, and a number of anchoring arrangementsare illustrated in FIGS. 7 through 9.

FIG. 3 is a side elevational View of a typical installation of a supportframe unit, showing one of the framing members 14 connected to a wall atits upper end and anchored to a oor at its lower end. The frame member14 may be formed from tubular metal stock so as to includethe-horizontal portion 16 and the vertical portion .18, as illustrated.In a typical example, the horizontal portion may extend outwardly fromthe wall for a distance of -12 inches. In addition, an end plate member30 is secured to the upper end of the framing member 14 to provide ailat lower surface from which the overhead track rail 24 can besuspended. Bolts, or other fastening devices, 32 are used to secure anupper portion of the overhead track 24 to a at bottom surface 34 of theend plate 30. As previously discussed, the framing unit is pre-assembledat its point of manufacture to the extent that all major components ofthe installation package are assembled, tested, and adjusted beforeshipment. Such pre-assembly includes a securement of the overhead track24 (or of a portion of it) to the upper ends of the framing members 14so that the track and the door means carried thereby will transmit theirloads to the framing members 14 of a completed installation. Shims orspacer washers may be used to adjust the position of the overhead trackrelative to its connection with the framing members 14, and the trackitself is of a conventional form and construction. FIG. 3 alsoillustrates a typical anchoring of the lower end of the framing member14 into a floor area adjacent to the doorway. In addition, a mountingbracket 36 is shown for carrying an electric eye means which may be usedas a control for automatic opening and closing of a power operated door.

FIGS. 4 through 6 illustrate details of alternative arrangements forconnecting upper ends of the support frame units to wall portions arounda doorway. FIG. 4 represents a connection which may be used in a door-Way which is to lhave a wooden casing 40 placed around the entire dooropening. The wooden casing 40 is positioned between the support frameunits 10 and 12 and the wall surface to which the support frame unitsare to be connected, and the support frame units are connected directlyto the casing 40. In the illustrated embodiment, the casing 40 is placedagainst the surface of the wall, and long bolts 42 are inserted andfastened into aligned borings, formed into the casing and through thewall, to secure the casing in place. In the case of cold storage roomsor buildings, and especially in the case of freezer rooms, the bolts maybe insulated at each end to reduce conduction of heat into the room byway of the bolts 42. The support frame units 10 and 12 are secured tothe casing 40 by bolts 44, and the support frame units may be secured tothe casing prior to fastening the casing against the wall. The wallwhich is illustrated in the FIG. 4 arrangement may consist of aprefabricated sandwich panel having an insulating core and metal skinson each face of the core. Such a panel construction is not intended tocarry heavy loads, but with the present invention, the weight ofrelatively heavy doors is carried by the support frame units which arepositioned against the wall. In order to provide a tight connection ofthe frame 40 to the wall, a wooden spacer plug 46 may be insertedbetween the opposed metal Skins of the wall, as shown. FIG. 4 alsoillustrates the use of additional framing elements 48 `which function asguard rails on an opposite side of the wall from where the door iscarried. A single guard rail member 48 may be positioned at each side ofthe doorway (as shown in FIG. l1 for example), and the upper ends of theguard rails may be secured to the wall by the use of end plates 30 whichextend laterally 6 to each -side of each guard rail to provide amounting surface through which the bolts 42 may be passed. The endplates 30 for both the guard rails and the support frame units are`secured to the ends of the framing members by the use of fasteners orby welding.

FIG. 5 illustrates a typical installation where no wooden casing isprovided on the surface of the wall around the door opening. In thisinstallation, the support frame units are connected to the wall by longbolts 42 which extend from the overhead track 24 to an opposite `surfaceof the wall where they may be supported by a header member 50. As withthe previous embodiment, a spacer plug 46 may be included within thewall structure to maintain the designed thickness of the wall withoutany distortion of its surface areas.

FIG. 6 illustrates a third type of installation which is useful forplaster walls having no casings around the door opening. In thisarrangement, a horizontal header or buck member 52 is mounted across thewall opening to define the height of the opening. Vertical iamb membersmay be positioned at each side of the opening to support the header l52and to define the width of the wall opening. Then, the support frameunits are fastened to the header 52 in the manner illustrated so thatthe upper ends of the support frame units do not contact and damage theplaster wall. As with the previously described arrangements, guard rails48 may be provided on an opposite side of the wall, and an invertedL-shaped member 54 may be provided for connecting the upper ends of theguard rails 48 to the header 52. The arrangement which is shown in FIG.6 may be used for existing masonry wall structures in older buildings,and it can be vseen that it is only necessary to form a sufficientlylarge opening through the wall to receive the header 52 and itsassociated jambs. In the insulated panel constructions shown in FIGS. 4and 5, the panels may be used to till in space of a very large openingwhich is formed in an existing wall, or in a new construction.

FIGS. 7 through 9 illustrate several arrangements for anchoring lowerends of the support frame units to floor areas adjacent a doorway. FIG.7 illustrates an arrangement wherein each support frame member 14 of thesupport frame units 10 and 12 includes an extension portion which can beembedded into the floor itself. In the preferred construction of thesupport frame units, base plate elements `62 are welded, or otherwisesecured, to the base ends of the support frame members 14, and the baseplate ele-ments 62 are intended to iix the position of the support frameunit on a floor and to carry one or more guide members 64 which guidelower edges of door panels. The base plate members I62 may be positionedon the Hoor area which is adjacent to the doorway, or they may beembedded into the floor surface slightly so that their upper surfacesare ush with surrounding floor areas. In the FIG. 7 arrangement, aconcrete floor is illustrated, and concrete is removed from 4the placewhere the extension member 60 is to be positioned at the time ofinstallation, Then, wet concrete mix can be lled around the extensionmember 60 to anchor the framing member to the floor. FIG. 7 alsoillustrates a separate guide member 66 which is carried by a plate thatcan be anchored into the concrete floor. 'Ihe separate guide member 66is normally placed in a position against the wall surface so that a doorcan be moved along the wall surface between the .two guide members `64and 66 for part of its travel.

FIG. 8 illustrates an alternative anchoring arrangement wherein aseparate anchor plate is xed into position in a concrete Ifloor with itsanchoring elements 72 embedded in the concrete. The anchor plate 70 maycarry a mounting bracket for the guide members 66, and the mountingbracket -may be secured to the anchor plate 70 by welding or by anyother suitable means. With lthe FIG. 8 arrangement, a support frame unitis attached to the anchor plate 70 by bolting its base plates 62 toportions of the anchor plates 70. As sho-wn, each base plate element 62carries a mounting .bracketfor theA guide member 64. With thisarrangement it is possible to prepare anchoring positions for supportframe units prior to actual installation of the support frame units, andthen, when the support frame units are to be installed, they can bemerely welded or bolted to the previously placed anchor plates 70.

FIG. 9 illustrates an anchoring arrangement wherein the base plateelement 62 is merely placed on the surface of a floor, and is securedthereto by anchoring bolts 74. The anchoring bolts may be used incombination with expansion plugs, of well known construction, foreffecting a tight engagement of the bolts 74 into borings formed intothe concrete floor.

Having described the constructional features, and method ofinstallation, of the present invention, it can be seen that a veryuseful arrangement lis provided for manufacturing, shipping, andinstalling relatively large door assemblies. Although theinvention has-typical utility for installation of insulated doors used in coldstorage areas, it can be appreciated that it likewise is useful forothertypes of door structures. The invention eliminates requirements forcostly modification and reinforcement of existing walls, or of wallswhich are being built in modern panel wall constructions, and yet, avery secure and strong arrangement is provided for supporting arelatively heavy door assembly. The individual panels which make up thedoor assembly may include sealing gaskets around their inner faces sothat a tight seal is for-med around the doorway when the door panels aremoved to closed positions. It will be appreciated that the door means ofthe present invention is intended to move along an outer surface of awall so that there is no requirement for building a pocket, andinsulating the same, within a wall structure. The installation packagemay include a power unit having an electric motor, control panel, andall associated mechanisms for sliding door panels along a track, 'andsuch power units are well known to this art. The support frame units ofthe invention not only support the weight of the door means and itsassociated devices, but also, protection is provided to the doorway bythe support frame members 14 and 25 which are positioned on each side ofthe doorway and on each side of a wall. This is especially important indoorways through which vehicles are normally operated, or where there isa lot of traffic, since such doorways, and their associated doorstructures, are often da-maged by contact with moving vehicles, carts,or other moving devices. In addition, the support Aframe units of thisinvention provide a safe mounting position for power and control unitswhich may be associated with automatically operated doors. Power andcontrol units should be placed above the floor level, and the supportframe units which are provided by this invention yafford an easy andsafe placement of such power and control units. Furthermore, the powerand control units are protected during shipping and after installationby the unitary construction ofV individual support frame units of thetype discussed for this invention. All component parts of the doorassembly, in-

cluding the gaskets of the door panels themselves, are readilyaccessible Ifor lubrication, adjustment, repair or replacement.

What is claimed is:

1. An installation package for installing and supporting prefabricateddoors on an external surface of a wall, said package comprisingcomponents which, when installed, provide the combination of:

a pair of support frame units installed on one side of a wall having anopening formed therethrough so as to carry the weight of a door meanswhich is suspended from said pair of support lframe units, each of saidsupport frame units including (a) a generally horizontally disposedmember for contacting a surface portion of the wall through which thedoor opening is formed and for carrying an overhead track means, saidhorizontally disposed member being installed relative to a wall toextend outwardly therefrom, and

(b) a generally vertically disposed member which eX- tends between thehorizontally disposed member and a floor area adjacent to the wall wherethe door is installed,

an overhead track means suspended from said support frame units so as toreceive bearing elements carried by said door means, and

actuating means carried by said support frame -units and operativelyconnected to said door means to move said door means along said overheadtrack means so that the opening formed through the wall can be open-edand closed by said door means.

2. The installation package of claim 1 wherein each support frame unitincludes a pair of said horizontally yand vertically disposed memberswhich are interconnected together to form a unitary structure.

3. The installation package of claim 1 wherein said door meanscomprisesra pair of door leaves which can be moved towards and away fromeach other along said overhead track means,

4. An installation package for installing and supporting doors without arequirement for an installation of heavy load supporting structures in awall through which a door opening is formed, comprising a support framemeans which can be positioned and installed against one side of the wallthrough which the door opening is formed, said support frame means beingof a configuration to extend outwardly from said wall and downwardly toa floor area adjacent to the wall so that the entire weight of a doormeans can be carried by said support frame means, said support framemeans further including framing unembers which extend outwardly from thewall and downwardly to the floor area at each side margin of the dooropening so as to function as guard means to protect the doorway fromvehicles which may pass through the door opening, and

overhead supporting means suspended from said support frame means tocarry said door means in suspended relationship to said support framemeans, said overhead supporting means comprising an overhead track meanswhich can receive bearing elements carried by said door means.

5. The installation package of claim 4 wherein said support frame meanscomprises two support frame units which can be positioned adjacent eachside of a door opening so as to suspend a door means between the twosupport frame units and over said door opening.

6. The installation package of claim 4 wherein said support frame meansis anchored to a surface portion of said wall so that there is norequirement for insertion of load-bearing members in said wall.

7. The installation package of claim 4 and including guard rail membersfor installation on a side of the wall which is opposite to the sidewhere said support frame means is installed.

8. The installation package of claim 5 wherein each of said two supportframe units includes (a) a base portion which is positioned away from awall and which can be anchored into a -:floor area adjacent the wall,and (b) a base plate which extends toward the wall from the baseportion.

9. The installation package of claim 8 wherein said base plate carriesdoor guide means for guiding the lower edge of a door relative to thewall when the door is being opened or closed.

10. The installation package of claim 5 wherein said overhead supportingmeans comprises an overhead track means, and wherein each of saidsupport frame units is assembled and adjusted at the place ofmanufacture so as to include a part of said overhead track means, sothat the overhead track is automatically positioned when said supportframe units are erected into installed positions relative to a wall.

11. The installation package of claim l wherein each support frame unitcarries one-half of the overhead track.

12. An installation package for installing and supporting doors withouta requirement for an installation of heavy load supporting structures ina wall through which a door opening is formed, comprising a supportframe means which can be positioned and installed against one side ofthe wall through which the door opening is formed, said support framemeans being of a configuration to extend outwardly from said wall anddownwardly to a iioor area adjacent to the wall so that the entireweight of a door means can be carried by said support frame means, saidsupport frame means further including framing members which extendoutwardly from the wall and downwardly to the oor area at each sidemargin of the door opening so as to function as guard means to protectthe doorway from vehicles which may pass through the door opening,overhead supporting means suspended from said support frame means tocarry said door means in suspended relationship to said support framemeans, and a power unit carried and protected by said support framemeans, said power unit being operatively connected to said door means toopen and close said door means relative to the door opening in the wall.13. A prefabricated door assembly which can be shipped in a knocked downcondition and then assembled and installed adjacent a wall surface toprovide the combination of:

a pair of support frame units positioned on one side of a Wall having anopening therethrough so as to be secured to a portion of the Wall andanchored to a portion of a floor area adjacent to the 'wall in such away that the support frame units and the iioor carry essentially theentire load of a door means and its associated mechanisms withouttransferring said load to the wall, each of said support frame unitsbeing of a conguration to extend outwardly from the wall and downwardlyto a oor area adjacent to the wall,

an overhead track means carried by said pair of support frame units tocarry and guide sliding door means adjacent to said wall and itsopening,

sliding door means suspended from said overhead track means so as to bemoved along the overhead track means to open and close the openingformed through the wall, and

actuating means operatively connected to said sliding door means to moveand control said sliding door means.

References Cited UNITED STATES PATENTS 2,732,919 1/1956l Johnson 49-409X 2,787,247 4/ 1957 Purcell et al. 49-380 X 3,079,650 3/ 1963 Spence49-409 X 3,425,162 2/ 1969 Halpern 149-409 X FOREIGN PATENTS 1,388,58612/ 1964 France 49-504 J. KARL BELL, Primary Examiner U.S. Cl. X.R.

